.page-about {
  --page-card-radius: 18px;
  --page-display: var(--display);
  --page-body: var(--body);
  background: var(--ink-black);
  color: var(--text-white);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-about .about-breadcrumb-wrap {
  padding-top: 28px;
}

.page-about .about-breadcrumb-wrap .crumb {
  color: var(--text-soft);
  font-size: 13px;
  text-decoration: none;
}

.page-about .about-breadcrumb-wrap .crumb:hover {
  color: var(--brand-blue);
}

.page-about .about-breadcrumb-wrap .crumb[aria-current="page"] {
  color: var(--text-white);
}

.page-about .breadcrumb-sep {
  color: var(--border-dim);
  margin: 0 8px;
}

.page-about .about-hero {
  padding: 36px 0 80px;
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  top: 20px;
  right: -160px;
  background: radial-gradient(circle, rgba(0,229,255,0.16) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .hero-grid {
  display: grid;
  gap: 32px;
  position: relative;
  z-index: 1;
}

.page-about .hero-index {
  display: flex;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--border-dim);
  padding-top: 20px;
  position: relative;
}

.page-about .hero-index::after {
  content: "";
  position: absolute;
  left: 0;
  top: -2px;
  width: 48px;
  height: 3px;
  background: var(--brand-blue);
  box-shadow: var(--shadow-blue);
}

.page-about .hero-vol {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--text-soft);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  margin-right: 6px;
}

.page-about .hero-year {
  font-family: var(--display);
  font-size: clamp(88px, 24vw, 220px);
  line-height: 0.8;
  color: var(--brand-blue);
  text-shadow: 0 0 32px rgba(0,229,255,0.5);
  letter-spacing: -0.02em;
}

.page-about .hero-edition {
  font-size: 13px;
  color: var(--text-soft);
  border: 1px solid var(--border-dim);
  padding: 6px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.page-about .hero-copy .section-index {
  color: var(--brand-blue);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 2px;
}

.page-about .hero-copy h1 {
  margin: 18px 0 16px;
  font-family: var(--display);
  font-size: clamp(2.1rem, 7vw, 4.3rem);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--text-white);
}

.page-about .hero-lede {
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.8;
  max-width: 640px;
}

.page-about .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .hero-archive-card {
  margin-top: 12px;
  background: linear-gradient(145deg, var(--panel-dark) 0%, #111318 100%);
  border: 1px solid var(--border-dim);
  border-radius: 22px 4px 22px 4px;
  padding: 16px;
  position: relative;
}

.page-about .hero-archive-card::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(0,229,255,0.12);
  border-radius: 14px;
  pointer-events: none;
}

.page-about .archive-card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}

.page-about .archive-card-head .card-index {
  color: var(--brand-blue);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 2px;
}

.page-about .hero-archive-img {
  display: block;
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: 14px;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.page-about .archive-card-caption {
  margin-top: 14px;
  color: var(--text-soft);
  font-size: 13px;
  text-align: right;
  position: relative;
  z-index: 1;
}

.page-about .stats-strip {
  background: var(--paper-white);
  color: var(--text-black);
  padding: 30px 0;
  border-top: 2px solid var(--brand-blue);
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .stat-cell {
  border-left: 4px solid var(--brand-blue);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: linear-gradient(90deg, rgba(0,229,255,0.06), transparent 60%);
  min-width: 0;
}

.page-about .stat-num {
  font-family: var(--display);
  font-size: clamp(2.4rem, 10vw, 4rem);
  line-height: 1;
  color: var(--text-black);
}

.page-about .stat-label {
  font-size: 12px;
  color: #444;
  letter-spacing: 0.5px;
}

.page-about .about-intro,
.page-about .about-update {
  padding: 80px 0;
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-bottom: 2px solid var(--brand-blue);
  padding-bottom: 12px;
  margin-bottom: 40px;
}

.page-about .section-head .section-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--brand-blue);
  letter-spacing: 2px;
  white-space: nowrap;
}

.page-about .section-head .section-title {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.page-about .intro-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.page-about .intro-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
  color: var(--text-soft);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .intro-copy a {
  color: var(--brand-blue);
}

.page-about .trust-note {
  background: var(--panel-dark);
  border-left: 4px solid var(--brand-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 20px;
  color: var(--text-white);
  font-size: 14px;
}

.page-about .intro-bento {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .bento-mini {
  border: 1px solid var(--border-dim);
  border-radius: var(--page-card-radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 140px;
  background: linear-gradient(145deg, #12151b 0%, #171b22 100%);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
  min-width: 0;
}

.page-about .bento-mini::after {
  content: "";
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  right: -24px;
  bottom: -24px;
  filter: blur(34px);
  opacity: 0.5;
}

.page-about .bento-a::after {
  background: rgba(0,229,255,0.55);
}

.page-about .bento-b::after {
  background: rgba(255,42,109,0.5);
}

.page-about .bento-c::after {
  background: rgba(0,229,255,0.35);
}

.page-about .bento-d::after {
  background: rgba(255,42,109,0.35);
}

.page-about .bento-mini:hover {
  transform: translateY(-4px);
  border-color: var(--brand-blue);
  box-shadow: var(--shadow-blue);
}

.page-about .bento-mini .card-index {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--brand-blue);
  letter-spacing: 1px;
}

.page-about .bento-mini strong {
  font-size: 20px;
  color: var(--text-white);
  font-weight: 700;
}

.page-about .bento-mini span:last-child {
  color: var(--text-soft);
  font-size: 13px;
}

.page-about .about-arch {
  background: var(--paper-white);
  color: var(--text-black);
  padding: 80px 0;
}

.page-about .about-arch .section-title {
  color: var(--text-black);
}

.page-about .arch-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.page-about .arch-copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
  color: #333;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .arch-copy a {
  color: #00637A;
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
}

.page-about .arch-heat {
  background: #ffffff;
  border: 1px solid #ddd;
  border-radius: 18px 4px 18px 4px;
  padding: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
  min-width: 0;
}

.page-about .arch-heat img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  background: var(--paper-white);
}

.page-about .heat-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 18px;
  margin-top: 14px;
  font-size: 12px;
  color: #666;
}

.page-about .legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .legend-dot.high {
  background: var(--brand-blue);
  box-shadow: 0 0 12px rgba(0,229,255,0.6);
}

.page-about .legend-dot.mid {
  background: #7f8c99;
}

.page-about .legend-dot.low {
  background: #c3c9d1;
}

.page-about .update-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

.page-about .update-block {
  border-left: 1px solid var(--border-dim);
  padding-left: 20px;
  margin-bottom: 28px;
}

.page-about .update-block h3 {
  font-size: 18px;
  color: var(--text-white);
  margin: 0 0 8px;
}

.page-about .update-block p {
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
}

.page-about .update-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-about .sync-card {
  background: linear-gradient(145deg, #12151b 0%, #1a1e26 100%);
  border: 1px solid var(--border-dim);
  border-radius: 18px 4px 18px 4px;
  padding: 18px;
}

.page-about .sync-card img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 14px;
  object-fit: cover;
}

.page-about .sync-card p {
  color: var(--text-soft);
  font-size: 13px;
  margin: 14px 0 0;
}

.page-about .timeline-card {
  margin-top: 48px;
  background: var(--panel-dark);
  border: 1px solid var(--border-dim);
  border-radius: 18px 4px 18px 4px;
  padding: 28px 18px 18px;
  position: relative;
  overflow: hidden;
}

.page-about .timeline-arc {
  display: block;
  width: 100%;
  height: 90px;
  margin-bottom: 12px;
}

.page-about .timeline-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .timeline-head > span:first-child {
  color: var(--text-white);
  font-weight: 700;
  font-size: 15px;
}

.page-about .timeline-scroll {
  display: grid;
  gap: 10px;
  position: relative;
}

.page-about .timeline-item {
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border-dim);
  border-radius: 12px;
  padding: 14px 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.page-about .timeline-item::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border-dim);
  border: 2px solid var(--brand-blue);
  flex-shrink: 0;
}

.page-about .timeline-item.current {
  border-color: var(--brand-blue);
  box-shadow: var(--shadow-blue);
  background: linear-gradient(90deg, rgba(0,229,255,0.08), transparent);
}

.page-about .timeline-item.current::before {
  background: var(--brand-blue);
  box-shadow: 0 0 14px rgba(0,229,255,0.8);
}

.page-about .tl-version {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-white);
}

.page-about .tl-note {
  font-size: 12px;
  color: var(--text-soft);
  text-align: right;
  margin-left: auto;
}

.page-about .timeline-links {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.page-about .tl-link {
  font-size: 12px;
  padding: 6px 12px;
  border: 1px solid var(--border-dim);
  border-radius: 999px;
  color: var(--text-soft);
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition);
}

.page-about .tl-link:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
}

.page-about .about-audience {
  background: var(--paper-white);
  color: var(--text-black);
  padding: 80px 0;
}

.page-about .about-audience .section-title {
  color: var(--text-black);
}

.page-about .audience-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .audience-card {
  background: #ffffff;
  border: 1px solid #e2e2e2;
  border-radius: 18px 4px 18px 4px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.page-about .audience-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,255,0.7);
  box-shadow: 0 16px 32px rgba(0,0,0,0.06);
}

.page-about .audience-card .card-index {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--brand-blue);
  letter-spacing: 1px;
  margin-bottom: 14px;
}

.page-about .audience-card h3 {
  font-size: 19px;
  color: var(--text-black);
  margin: 0 0 10px;
}

.page-about .audience-card p {
  font-size: 14px;
  color: #555;
  line-height: 1.75;
  margin: 0;
}

.page-about .service-boundary {
  margin-top: 48px;
  background: linear-gradient(145deg, #0d0e11 0%, #14161b 100%);
  color: var(--text-white);
  border-radius: 28px 6px 28px 6px;
  padding: 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  box-shadow: 0 18px 40px rgba(0,0,0,0.2);
}

.page-about .boundary-contact h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.page-about .boundary-contact p {
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 12px;
}

.page-about .boundary-contact a {
  color: var(--brand-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .boundary-note {
  border-top: 1px solid var(--border-dim);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .boundary-note p {
  color: var(--text-soft);
  font-size: 13px;
  line-height: 1.8;
  margin: 0;
}

@media (min-width: 640px) {
  .page-about .stats-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .intro-bento {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .service-boundary {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .page-about .boundary-note {
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--border-dim);
    padding-left: 26px;
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: 180px minmax(0, 1fr) 460px;
    align-items: center;
  }

  .page-about .hero-index {
    flex-direction: column;
    align-items: flex-start;
    border-top: 0;
    padding-top: 0;
    border-right: 1px solid var(--border-dim);
    margin-right: 40px;
  }

  .page-about .hero-index::after {
    top: 0;
    left: -2px;
    width: 3px;
    height: 64px;
  }

  .page-about .hero-vol {
    writing-mode: horizontal-tb;
  }

  .page-about .hero-archive-card {
    margin-top: 0;
  }

  .page-about .intro-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .arch-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }

  .page-about .update-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .timeline-scroll {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .audience-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-intro,
  .page-about .about-update,
  .page-about .about-arch,
  .page-about .about-audience {
    padding: 96px 0;
  }
}